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Annotation of os232sdk/toolkt20/c/samples/calc/dcalc/dcalc.c, revision 1.1

1.1     ! root        1: /****************************** Module Header ******************************\
        !             2: * Module Name: dcalc.c - Dialog form of the Calc application
        !             3: *
        !             4: * OS/2 Presentation Manager version of Calc, ported from Windows version
        !             5: *
        !             6: * Created by Microsoft, IBM Corporation, 1990
        !             7: *
        !             8: *      DISCLAIMER OF WARRANTIES.  The following [enclosed] code is 
        !             9: *      sample code created by Microsoft Corporation and/or IBM 
        !            10: *      Corporation. This sample code is not part of any standard 
        !            11: *      Microsoft or IBM product and is provided to you solely for 
        !            12: *      the purpose of assisting you in the development of your 
        !            13: *      applications.  The code is provided "AS IS", without 
        !            14: *      warranty of any kind.  Neither Microsoft nor IBM shall be 
        !            15: *      liable for any damages arising out of your use of the sample 
        !            16: *      code, even if they have been advised of the possibility of 
        !            17: *      such damages.
        !            18: *
        !            19: \***************************************************************************/
        !            20: 
        !            21: #define INCL_DEV
        !            22: #define INCL_DOSPROCESS
        !            23: #define INCL_DOSSEMAPHORES
        !            24: #define INCL_DOSNLS
        !            25: #define INCL_ERRORS
        !            26: #define INCL_WINBUTTONS
        !            27: #define INCL_WINCLIPBOARD
        !            28: #define INCL_WINDIALOGS
        !            29: #define INCL_WINFRAMEMGR
        !            30: #define INCL_WININPUT
        !            31: #define INCL_WINMENUS
        !            32: #define INCL_WINMESSAGEMGR
        !            33: #define INCL_WINPOINTERS
        !            34: #define INCL_WINSWITCHLIST
        !            35: #define INCL_WINTRACKRECT
        !            36: #define INCL_WINWINDOWMGR
        !            37: #include <os2.h>
        !            38: #include <string.h>
        !            39: #include <stdlib.h>
        !            40: #include <stdio.h>
        !            41: #include "dcalc.h"
        !            42: 
        !            43: /************* GLOBAL VARIABLES         */
        !            44: 
        !            45: char chLastKey, currkey;
        !            46: char szCalcClass[] = "Calculator";
        !            47: char szTitle[30];
        !            48: char szreg1[20], szreg2[20], szmem[20], szregx[20];
        !            49: /* hope 20 is enough for kanji error string */
        !            50: char szErrorString[20], szPlusMinus[2];
        !            51: short charwidth, charheight;
        !            52: int aspectx, aspecty, nchszstr;
        !            53: extern BOOL fError  = FALSE;
        !            54: BOOL fValueInMemory = FALSE;
        !            55: BOOL fMDown = FALSE;
        !            56: UCHAR mScan = 0;
        !            57: 
        !            58: #define TOLOWER(x)   ( (((x) >= 'A') && ((x) <= 'Z')) ? (x)|0x20 : (x))
        !            59: #define WIDTHCONST  28
        !            60: #define CXCHARS     37
        !            61: #define CYCHARS     13
        !            62: 
        !            63: HAB hab;
        !            64: HDC hdcLocal;                      /* Local used for button bitmap */
        !            65: HPS hpsLocal;
        !            66: HDC hdcSqr;                        /* Sqr used for square-root bitmap */
        !            67: HPS hpsSqr;
        !            68: HBITMAP hbmLocal, hbmSqr;
        !            69: HMQ  hmqCalc       = NULL;
        !            70: 
        !            71: HWND hwndCalc      = NULL,
        !            72:      hwndMenu      = NULL;
        !            73: 
        !            74: HPOINTER hptrFinger = NULL,
        !            75:         hptrIcon   = NULL;
        !            76: 
        !            77: DEVOPENSTRUC dop =                 /* used by DevOpenDC */
        !            78: {
        !            79:     NULL, "DISPLAY", NULL, NULL, NULL, NULL, NULL, NULL, NULL
        !            80: };
        !            81: 
        !            82: static char bButtonValues[] =      /* Button values */
        !            83: {
        !            84:     0xBC, 0xBB, 0xBA, 0xB9,  '0',  '1',  '2',  '3',  '4',
        !            85:      '5',  '6',  '7',  '8',  '9',  '.',  '/',  '*',  '-',
        !            86:      '+',  'q',  '%',  'c',  '=', 0xB1, NULL
        !            87: };
        !            88: 
        !            89: /************* PROCEDURE DECLARATIONS   */
        !            90: 
        !            91: MPARAM EXPENTRY AboutDlgProc(HWND, USHORT, MPARAM, MPARAM);
        !            92: BOOL CalcInit(VOID);
        !            93: VOID CalcPaint( HWND, HPS);
        !            94: MRESULT EXPENTRY fnDlgCalc(HWND, USHORT, MPARAM, MPARAM);
        !            95: VOID cdecl main(VOID);
        !            96: VOID DataXCopy( VOID);
        !            97: VOID DataXPaste( VOID);
        !            98: VOID DrawNumbers( HPS);
        !            99: VOID Evaluate(BYTE);
        !           100: VOID InitCalc( VOID);
        !           101: BOOL InterpretChar( CHAR);
        !           102: VOID ProcessKey(HWND, WPOINT *);
        !           103: char Translate(WPOINT *);
        !           104: VOID UpdateDisplay( VOID);
        !           105: 
        !           106: 
        !           107: 
        !           108: /********************************************************************
        !           109:    Write the appropriate number or error string to the display area
        !           110:    and mark memory-in-use if appropriate.
        !           111:  */
        !           112: 
        !           113: BYTE aszDisplayBuff[20];
        !           114: 
        !           115: VOID UpdateDisplay()
        !           116: {
        !           117:     strcpy(aszDisplayBuff, fError? "Error" :szreg1);
        !           118:     strcat(aszDisplayBuff, fValueInMemory? " M" : "  ");
        !           119: 
        !           120:     WinSetDlgItemText(hwndCalc, TXT_RESULT_DISPLAY, aszDisplayBuff);
        !           121: }
        !           122: 
        !           123: 
        !           124: /**********************************************************************
        !           125:     Display helpful info
        !           126:  */
        !           127: 
        !           128: MPARAM EXPENTRY AboutDlgProc(hwnd, msg, mp1, mp2)
        !           129: HWND hwnd;
        !           130: USHORT msg;
        !           131: MPARAM mp1;
        !           132: MPARAM mp2;
        !           133: {
        !           134:     if (msg == WM_COMMAND)
        !           135:     {
        !           136:         WinDismissDlg(hwnd, TRUE);
        !           137:        return(MPFROMSHORT(TRUE));
        !           138:     }
        !           139:     else return(WinDefDlgProc(hwnd, msg, mp1, mp2));
        !           140: }
        !           141: 
        !           142: 
        !           143: /**********************************************************************
        !           144:     General initialization
        !           145:  */
        !           146: 
        !           147: BOOL CalcInit()
        !           148: {
        !           149:     hab = WinInitialize(0);
        !           150: 
        !           151:     hmqCalc = WinCreateMsgQueue( hab, 0);
        !           152: 
        !           153:     return(TRUE);
        !           154: }
        !           155: 
        !           156: /**********************************************************************
        !           157:     main procedure
        !           158:  */
        !           159: 
        !           160: VOID cdecl main()
        !           161: {
        !           162:     QMSG qmsg;
        !           163: 
        !           164:     if (!CalcInit()) {                     /* general initialization */
        !           165:         WinAlarm(HWND_DESKTOP, 0xffff);
        !           166:         goto exit;
        !           167:     }
        !           168: 
        !           169:     WinLoadDlg(HWND_DESKTOP, HWND_DESKTOP, fnDlgCalc, NULL, CALCDLG, NULL);
        !           170: 
        !           171:     if (hwndCalc)
        !           172:        while (WinGetMsg( hab, (PQMSG)&qmsg, NULL, 0, 0))
        !           173:            WinDispatchMsg( hab, (PQMSG)&qmsg);
        !           174: 
        !           175: exit:                                      /* clean up */
        !           176: 
        !           177:     if (hwndMenu)      WinDestroyWindow(hwndMenu);
        !           178: 
        !           179:     WinDestroyMsgQueue(hmqCalc);
        !           180:     WinTerminate(hab);
        !           181: 
        !           182:     DosExit(EXIT_PROCESS, 0);              /* exit without error */
        !           183: }
        !           184: 
        !           185: 
        !           186: /*************************************************************************
        !           187:    Calc Dialog Window Procedure
        !           188:  */
        !           189: 
        !           190: 
        !           191: TID    idThread;
        !           192: PID    idProcess;
        !           193: SWCNTRL swc;
        !           194: HSWITCH hsw;
        !           195: USHORT usWidthCalc, usHeightCalc;
        !           196: 
        !           197: MRESULT EXPENTRY fnDlgCalc(hwnd, msg, mp1, mp2)
        !           198: HWND hwnd;
        !           199: USHORT msg;
        !           200: MPARAM mp1;
        !           201: MPARAM mp2;
        !           202: {
        !           203:     RECTL rectl;
        !           204:     BOOL fClip;
        !           205:     USHORT fi, idCtrl;
        !           206:     MRESULT mresult;
        !           207:     USHORT  afSWP;
        !           208:     PSWP    pswp;
        !           209: 
        !           210:     static BOOL fMinimized;
        !           211: 
        !           212: 
        !           213:     switch (msg)
        !           214:     {
        !           215:     case WM_INITDLG:
        !           216: 
        !           217: /* Set up the global state assumed by the dialog.
        !           218:  */
        !           219:        hwndCalc = hwnd;
        !           220:        hwndMenu = WinLoadMenu(hwnd, NULL, IDR_CALC);
        !           221: 
        !           222:        fMinimized = FALSE;
        !           223: 
        !           224:        hptrFinger = WinLoadPointer(HWND_DESKTOP, (HMODULE)NULL, IDP_FINGER);
        !           225:        hptrIcon   = WinLoadPointer(HWND_DESKTOP, (HMODULE)NULL, IDR_CALC);
        !           226: 
        !           227:        WinSetWindowULong(hwndCalc, QWL_STYLE,
        !           228:                          FS_ICON | WinQueryWindowULong(hwndCalc, QWL_STYLE)
        !           229:                         );
        !           230: 
        !           231:        WinSendMsg(hwndCalc, WM_SETICON,     (MPARAM) hptrIcon, 0L);
        !           232:        WinSendMsg(hwndCalc, WM_UPDATEFRAME, (MPARAM) 0L,       0L);
        !           233: 
        !           234:        WinQueryWindowRect(hwndCalc, &rectl);
        !           235:         usWidthCalc= (SHORT) (rectl.xRight - rectl.xLeft);
        !           236:        usHeightCalc= (SHORT) (rectl.yTop   - rectl.yBottom);
        !           237: 
        !           238:        WinQueryWindowProcess(hwndCalc, &idProcess, &idThread);
        !           239: 
        !           240:        WinLoadString(NULL, NULL, 1, 30, (PSZ)szTitle);
        !           241:        WinLoadString(NULL, NULL, 2, 20, (PSZ)szErrorString);
        !           242:        WinLoadString(NULL, NULL, 3, 2,  (PSZ)szPlusMinus);
        !           243: 
        !           244:        strcpy(swc.szSwtitle, szTitle);
        !           245:        swc.hwnd          = hwndCalc;
        !           246:        swc.hwndIcon      = hptrIcon;
        !           247:        swc.hprog         = (ULONG)NULL;
        !           248:        swc.idProcess     = idProcess;
        !           249:        swc.idSession     = (USHORT)0;
        !           250:        swc.uchVisibility = SWL_VISIBLE;
        !           251:        swc.fbJump        = SWL_JUMPABLE;
        !           252:        hsw               = WinAddSwitchEntry((PSWCNTRL)&swc);
        !           253: 
        !           254:        InitCalc();                         /* arithmetic initialization */
        !           255: 
        !           256:        WinSetActiveWindow(HWND_DESKTOP, hwndCalc);
        !           257: 
        !           258:        WinSetFocus(HWND_DESKTOP, hwndCalc);
        !           259: 
        !           260:        break;
        !           261: 
        !           262:     case WM_MINMAXFRAME:
        !           263: 
        !           264:        pswp= PVOIDFROMMP(mp1);
        !           265: 
        !           266:        if (pswp->fl & SWP_MINIMIZE)
        !           267:            fMinimized= TRUE;
        !           268:        else if (pswp->fl & SWP_RESTORE)
        !           269:            fMinimized= FALSE;
        !           270: 
        !           271:        return(WinDefDlgProc(hwnd, msg, mp1, mp2));
        !           272: 
        !           273:        break;
        !           274: 
        !           275:     case WM_DESTROY:
        !           276: 
        !           277:        WinDestroyPointer(hptrIcon  );  hptrIcon  = NULL;
        !           278:        WinDestroyPointer(hptrFinger);  hptrFinger= NULL;
        !           279: 
        !           280:        break;
        !           281: 
        !           282:     case WM_INITMENU:
        !           283: 
        !           284:         fClip = FALSE;
        !           285: 
        !           286:         if (WinOpenClipbrd(NULL))
        !           287:         {
        !           288:             fClip = WinQueryClipbrdFmtInfo(NULL, CF_TEXT, (USHORT FAR *)&fi);
        !           289:             WinCloseClipbrd(NULL);
        !           290:         }
        !           291: 
        !           292:        WinSendMsg((HWND)mp2, MM_SETITEMATTR,
        !           293:                   (MPARAM) MAKELONG(CMD_PASTE, TRUE),
        !           294:                   (MPARAM) MAKELONG(MIA_DISABLED, fClip ? 0 : MIA_DISABLED));
        !           295:         break;
        !           296: 
        !           297:     case WM_ADJUSTWINDOWPOS:
        !           298: 
        !           299:        mresult= WinDefDlgProc(hwnd, msg, mp1, mp2);
        !           300: 
        !           301:        if (fMinimized) return(mresult);
        !           302: 
        !           303:        afSWP= (pswp= (PSWP) mp1)->fl;
        !           304: 
        !           305:        if (     afSWP & (SWP_SIZE     | SWP_MAXIMIZE)
        !           306:            && !(afSWP &  SWP_MINIMIZE)
        !           307:           )
        !           308:        {
        !           309:            pswp->y += pswp->cy - usHeightCalc;
        !           310:            pswp->cx =  usWidthCalc;
        !           311:            pswp->cy = usHeightCalc;
        !           312:        }
        !           313: 
        !           314:        return(mresult);
        !           315: 
        !           316: 
        !           317:     case WM_COMMAND:
        !           318: 
        !           319:        fError = FALSE;
        !           320: 
        !           321:        idCtrl= SHORT1FROMMP(mp1);
        !           322: 
        !           323:        if (   SHORT1FROMMP(mp2) == BN_CLICKED
        !           324:            && idCtrl >= BUTTON_MC
        !           325:            && idCtrl <= BUTTON_CHANGE_SIGN
        !           326:           )
        !           327:        {
        !           328:            Evaluate(bButtonValues[idCtrl-BUTTON_MC]);
        !           329:            UpdateDisplay();
        !           330:        }
        !           331:        else
        !           332:            switch(idCtrl)
        !           333:            {
        !           334:            case CMD_COPY:
        !           335:                DataXCopy();                    /* copy to clipboard */
        !           336:                break;
        !           337:            case CMD_PASTE:
        !           338:                DataXPaste();                   /* paste from clipboard */
        !           339:                break;
        !           340:            case CMD_EXIT:
        !           341:                WinPostMsg(hwndCalc, WM_QUIT, 0L, 0L);
        !           342:                break;
        !           343:            case CMD_ABOUT:
        !           344:                WinDlgBox(HWND_DESKTOP, hwndCalc, (PFNWP)AboutDlgProc, NULL,
        !           345:                          1, (PSZ)NULL);
        !           346:                break;
        !           347:            }
        !           348:         break;
        !           349: 
        !           350:     case WM_CLOSE:
        !           351:         WinPostMsg(hwndCalc, WM_QUIT, 0L, 0L);
        !           352:         break;
        !           353: 
        !           354:     case WM_CONTROLPOINTER:
        !           355:        if (!fMinimized) return(hptrFinger);
        !           356:        else return(WinDefDlgProc(hwnd, msg, mp1, mp2));
        !           357: 
        !           358:     case WM_MOUSEMOVE:
        !           359:        if (!fMinimized) WinSetPointer(HWND_DESKTOP, hptrFinger);
        !           360:         break;
        !           361: 
        !           362:     case WM_BUTTON1DOWN:
        !           363: 
        !           364:        return(WinDefDlgProc(hwnd, WM_TRACKFRAME, (MPARAM) TF_MOVE, mp2));
        !           365: 
        !           366:        break;
        !           367: 
        !           368:     case WM_CHAR:
        !           369: 
        !           370:        fError = FALSE;
        !           371: 
        !           372:        if (SHORT1FROMMP(mp1) & KC_KEYUP)
        !           373:        {
        !           374:            if (CHAR4FROMMP(mp1) == mScan)
        !           375:                fMDown = FALSE;                 /* 'm' key went up */
        !           376:        }
        !           377:        else if (SHORT1FROMMP(mp1) & KC_CHAR)
        !           378:         {
        !           379:            if (InterpretChar(CHAR1FROMMP(mp2)))
        !           380:                UpdateDisplay();
        !           381:            else if ((CHAR1FROMMP(mp2)=='m') || (CHAR1FROMMP(mp2)=='M'))
        !           382:            {
        !           383:                mScan = CHAR4FROMMP(mp1);       /* save 'm' key scan code */
        !           384:                fMDown = TRUE;                  /* 'm' key went down */
        !           385:            }
        !           386:         }
        !           387:         break;
        !           388: 
        !           389:     case WM_ERASEBACKGROUND:
        !           390:        if (WinQueryWindowULong(hwnd, QWL_STYLE) & WS_MINIMIZED)
        !           391:            WinValidateRect(hwnd, (PRECTL) mp2, TRUE);
        !           392:        return(WinDefDlgProc(hwnd, msg, mp1, mp2));
        !           393:        break;
        !           394: 
        !           395:     case WM_SETFOCUS:
        !           396:        if ((HWNDFROMMP(mp1)==hwndCalc) && !mp2);
        !           397:            fMDown = FALSE;                     /* since we are losing focus */
        !           398: 
        !           399:     default:
        !           400:        return(WinDefDlgProc(hwnd, msg, mp1, mp2));
        !           401:         break;
        !           402:     }
        !           403:     return(0L);
        !           404: }
        !           405: 
        !           406: 
        !           407: /*************************************************************************
        !           408:     translate & interpret keys (ie. locate in logical keyboard)
        !           409:  */
        !           410: 
        !           411: BOOL InterpretChar(ch)
        !           412: register CHAR ch;
        !           413: {
        !           414:     BOOL fDone;
        !           415:     CHAR *chstep;
        !           416: 
        !           417:     fDone = FALSE;
        !           418:     chstep = bButtonValues;
        !           419:     switch (ch)
        !           420:     {
        !           421:     case 'n':
        !           422:        ch = szPlusMinus[0];
        !           423:         break;
        !           424:     case 27:                        /* xlate Escape into 'c' */
        !           425:         ch = 'c';
        !           426:         break;
        !           427:     case '\r':                      /* xlate Enter into '=' */
        !           428:         ch = '=';
        !           429:         break;
        !           430:     }
        !           431: 
        !           432:     if (fMDown)                    /* Do memory keys */
        !           433:     {
        !           434:         switch (ch)
        !           435:         {
        !           436:         case 'c':
        !           437:         case 'C':
        !           438:             ch = '\274';
        !           439:             break;
        !           440:         case 'r':
        !           441:         case 'R':
        !           442:             ch = '\273';
        !           443:             break;
        !           444:         case '+':
        !           445:             ch = '\272';
        !           446:             break;
        !           447:         case '-':
        !           448:             ch = '\271';
        !           449:             break;
        !           450:         }
        !           451:     }
        !           452: 
        !           453:     while (!fDone && *chstep)
        !           454:     {
        !           455:         if (*chstep++ == ch)
        !           456:            fDone = TRUE;               /* char found in logical keyboard */
        !           457:     }
        !           458: 
        !           459:     if (fDone)
        !           460:     {
        !           461:        Evaluate(ch);
        !           462:     }
        !           463: 
        !           464:     return (fDone);
        !           465: }

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